JPH02112094U - - Google Patents
Info
- Publication number
- JPH02112094U JPH02112094U JP2091889U JP2091889U JPH02112094U JP H02112094 U JPH02112094 U JP H02112094U JP 2091889 U JP2091889 U JP 2091889U JP 2091889 U JP2091889 U JP 2091889U JP H02112094 U JPH02112094 U JP H02112094U
- Authority
- JP
- Japan
- Prior art keywords
- sound
- monitoring microphone
- earmuff
- speaker
- canceled
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000012528 membrane Substances 0.000 claims description 2
- 238000012544 monitoring process Methods 0.000 claims 3
- 230000030279 gene silencing Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2091889U JPH0633750Y2 (ja) | 1989-02-25 | 1989-02-25 | アクティブ・ノイズ・キャンセラー |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2091889U JPH0633750Y2 (ja) | 1989-02-25 | 1989-02-25 | アクティブ・ノイズ・キャンセラー |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH02112094U true JPH02112094U (fr) | 1990-09-07 |
JPH0633750Y2 JPH0633750Y2 (ja) | 1994-08-31 |
Family
ID=31237691
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2091889U Expired - Lifetime JPH0633750Y2 (ja) | 1989-02-25 | 1989-02-25 | アクティブ・ノイズ・キャンセラー |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0633750Y2 (fr) |
-
1989
- 1989-02-25 JP JP2091889U patent/JPH0633750Y2/ja not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH0633750Y2 (ja) | 1994-08-31 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP3483879B2 (ja) | イヤホン | |
EP1398991A3 (fr) | Réduction du bruit acoustique | |
JPS62141293U (fr) | ||
JPH01196999A (ja) | ヘッドホン装置 | |
JP2001069590A (ja) | ノイズ低減ヘッドセット | |
JP3112268B2 (ja) | 騒音低減装置 | |
JP2781193B2 (ja) | アクティブ・ノイズ・キャンセラー | |
JPH11308685A (ja) | 能動型ノイズ低減ヘッドセット | |
GB2361379A (en) | Noise reducing headsets | |
JPH02112094U (fr) | ||
JPH0392898U (fr) | ||
JP2786278B2 (ja) | アクティブ・ノイズ・キャンセラー | |
JPH02112092U (fr) | ||
EP0464220A4 (en) | Earphone device | |
JPH0386694U (fr) | ||
JPH0753119Y2 (ja) | アクティブ・ノイズ・キャンセラー | |
JPH0275893U (fr) | ||
JP2786285B2 (ja) | アクティブ・ノイズ・キャンセラー | |
JPH02112093U (fr) | ||
JPH0386691U (fr) | ||
JPS6141320Y2 (fr) | ||
JPH01202100A (ja) | 音響装置 | |
JPH0386697U (fr) | ||
JPH0420098U (fr) | ||
JPH0386698U (fr) |